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wmaker/wrlib/raster.c
dan 36e46831e0 For libwraster: 
---------------

- Added retain/release mechanism to RImage by adding RRetainImage() and
  RReleaseImage(). RDestroyImage() is an alias to RReleaseImage() now, but
  will be removed in a future release because it no longer fits with the
  semantics. Will be kept for a while to allow a smoother transition.
  More about in wrlib/NEWS


For WINGs:
----------

- Small API change:
  1. Renamed WMSetApplicationIconImage(), WMGetApplicationIconImage() and
     WMSetWindowMiniwindowImage() to respectively WMSetApplicationIconPixmap(),
     WMGetApplicationIconPixmap() and WMSetWindowMiniwindowPixmap()
     They operate on a WMPixmap which is practically an X Pixmap with no alpha
     channel information and the new name is more suggestive and also leaves
     room for the new functions added for operating on images with alpha info.
  2. Added WMSetApplicationIconImage() and WMGetApplicationIconImage() which
     operate on an RImage and store alpha information too.
  3. Added WMGetApplicationIconBlendedPixmap() which will take the image with
     alpha set by WMSetApplicationIconImage() and will blend it with a color.
     If color is NULL it will blend using the default panel color (#aeaaae)
  All these changes will allow WINGs to handle images with alpha blending
  correctly in panels and wherever else needed. More about in WINGs/NEWS.
- updated panels to use the newly available RImages if present and fallback
  to old WMPixmaps if not, to properly show alpha blended images.
- replaced some still left malloc's with wmalloc's.


For Window Maker:
-----------------
- Fixed wrong mapping position of the "Docked Applications Panel" for some
  icons.
- Smoother animation for the smiley =)
- Made images with alpha blending be shown correctly in the panels and the
  icon chooser.
- The icon image set to be shown in panels ("Logo.WMPanel") will be
  automatically updated if its entry in WMWindowAttributes changes (without
  a need to restart as until now).


*** Note!!! ***

If you are developing applications with one of libwraster or libWINGs
then you should look to wrlib/NEWS and WINGs/NEWS to see what changed
and how should you update your code.
2001-04-21 07:12:21 +00:00

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/* raster.c - main and other misc stuff
*
* Raster graphics library
*
* Copyright (c) 1997-2000 Alfredo K. Kojima
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include "wraster.h"
#include <assert.h>
char *WRasterLibVersion="0.9";
int RErrorCode=RERR_NONE;
#define HAS_ALPHA(I) ((I)->format == RRGBAFormat)
RImage*
RCreateImage(unsigned width, unsigned height, int alpha)
{
RImage *image=NULL;
assert(width>0 && height>0);
image = malloc(sizeof(RImage));
if (!image) {
RErrorCode = RERR_NOMEMORY;
return NULL;
}
memset(image, 0, sizeof(RImage));
image->width = width;
image->height = height;
image->format = alpha ? RRGBAFormat : RRGBFormat;
image->refCount = 1;
/* the +4 is to give extra bytes at the end of the buffer,
* so that we can optimize image conversion for MMX(tm).. see convert.c
*/
image->data = malloc(width * height * (alpha ? 4 : 3) + 4);
if (!image->data) {
RErrorCode = RERR_NOMEMORY;
free(image);
image = NULL;
}
return image;
}
RImage*
RRetainImage(RImage *image)
{
if (image)
image->refCount++;
return image;
}
void
RReleaseImage(RImage *image)
{
assert(image!=NULL);
image->refCount--;
if (image->refCount < 1) {
free(image->data);
free(image);
}
}
/* Obsoleted function. Use RReleaseImage() instead. This was kept only to
* allow a smoother transition and to avoid breaking existing programs, but
* it will be removed in a future release. Right now is just an alias to
* RReleaseImage(). Do _NOT_ use RDestroyImage() anymore in your programs.
* Being an alias to RReleaseImage() this function no longer actually
* destroys the image, unless the image is no longer retained in some other
* place.
*/
void
RDestroyImage(RImage *image)
{
RReleaseImage(image);
}
RImage*
RCloneImage(RImage *image)
{
RImage *new_image;
assert(image!=NULL);
new_image = RCreateImage(image->width, image->height, HAS_ALPHA(image));
if (!new_image)
return NULL;
new_image->background = image->background;
memcpy(new_image->data, image->data,
image->width*image->height*(HAS_ALPHA(image) ? 4 : 3));
return new_image;
}
RImage*
RGetSubImage(RImage *image, int x, int y, unsigned width, unsigned height)
{
int i, ofs;
RImage *new_image;
unsigned total_line_size, line_size;
assert(image!=NULL);
assert(x>=0 && y>=0);
assert(x<image->width && y<image->height);
assert(width>0 && height>0);
if (x+width > image->width)
width = image->width-x;
if (y+height > image->height)
height = image->height-y;
new_image = RCreateImage(width, height, HAS_ALPHA(image));
if (!new_image)
return NULL;
new_image->background = image->background;
total_line_size = image->width * (HAS_ALPHA(image) ? 4 : 3);
line_size = width * (HAS_ALPHA(image) ? 4 : 3);
ofs = x*(HAS_ALPHA(image) ? 4 : 3) + y*total_line_size;;
for (i=0; i<height; i++) {
memcpy(&new_image->data[i*line_size],
&image->data[i*total_line_size+ofs], line_size);
}
return new_image;
}
/*
*----------------------------------------------------------------------
* RCombineImages-
* Combines two equal sized images with alpha image. The second
* image will be placed on top of the first one.
*----------------------------------------------------------------------
*/
void
RCombineImages(RImage *image, RImage *src)
{
assert(image->width == src->width);
assert(image->height == src->height);
if (!HAS_ALPHA(src)) {
if (!HAS_ALPHA(image)) {
memcpy(image->data, src->data, image->height*image->width*3);
} else {
int x, y;
unsigned char *d, *s;
d = image->data;
s = src->data;
for (y = 0; y < image->height; y++) {
for (x = 0; x < image->width; x++) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
d++;
}
}
}
} else {
register int i;
unsigned char *d;
unsigned char *s;
int alpha, calpha;
d = image->data;
s = src->data;
if (!HAS_ALPHA(image)) {
for (i=0; i<image->height*image->width; i++) {
alpha = *(s+3);
calpha = 255 - alpha;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
s++;
}
} else {
for (i=0; i<image->height*image->width; i++) {
alpha = *(s+3);
calpha = 255 - alpha;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; d++; s++;
*d++ |= *s++;
}
}
}
}
void
RCombineImagesWithOpaqueness(RImage *image, RImage *src, int opaqueness)
{
register int i;
unsigned char *d;
unsigned char *s;
int c_opaqueness;
assert(image->width == src->width);
assert(image->height == src->height);
d = image->data;
s = src->data;
c_opaqueness = 255 - opaqueness;
#define OP opaqueness
#define COP c_opaqueness
if (!HAS_ALPHA(src)) {
int dalpha = HAS_ALPHA(image);
for (i=0; i < image->width*image->height; i++) {
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; d++; s++;
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; d++; s++;
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; d++; s++;
if (dalpha) {
d++;
}
}
} else {
int tmp;
if (!HAS_ALPHA(image)) {
for (i=0; i<image->width*image->height; i++) {
tmp = (*(s+3) * opaqueness)/256;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
s++;
}
} else {
for (i=0; i<image->width*image->height; i++) {
tmp = (*(s+3) * opaqueness)/256;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d |= tmp;
d++; s++;
}
}
}
#undef OP
#undef COP
}
int
calculateCombineArea(RImage *des, RImage *src, int *sx, int *sy,
int *swidth, int *sheight, int *dx, int *dy)
{
if (*dx < 0) {
*sx = -*dx;
*swidth = *swidth + *dx;
*dx = 0;
}
if (*dx + *swidth > des->width) {
*swidth = des->width - *dx;
}
if (*dy < 0) {
*sy = -*dy;
*sheight = *sheight + *dy;
*dy = 0;
}
if (*dy + *sheight > des->height) {
*sheight = des->height - *dy;
}
if (*sheight > 0 && *swidth > 0) {
return True;
} else return False;
}
void
RCombineArea(RImage *image, RImage *src, int sx, int sy, unsigned width,
unsigned height, int dx, int dy)
{
int x, y, dwi, swi;
unsigned char *d;
unsigned char *s;
int alpha, calpha;
if(!calculateCombineArea(image, src, &sx, &sy, &width, &height, &dx, &dy))
return;
if (!HAS_ALPHA(src)) {
if (!HAS_ALPHA(image)) {
swi = src->width * 3;
dwi = image->width * 3;
s = src->data + (sy*(int)src->width + sx) * 3;
d = image->data + (dy*(int)image->width + dx) * 3;
for (y=0; y < height; y++) {
memcpy(d, s, width*3);
d += dwi;
s += swi;
}
} else {
swi = (src->width - width) * 3;
dwi = (image->width - width) * 4;
s = src->data + (sy*(int)src->width + sx) * 3;
d = image->data + (dy*(int)image->width + dx) * 4;
for (y=0; y < height; y++) {
for (x=0; x < width; x++) {
*d++ = *s++;
*d++ = *s++;
*d++ = *s++;
d++;
}
d += dwi;
s += swi;
}
}
} else {
int dalpha = HAS_ALPHA(image);
swi = (src->width - width) * 4;
s = src->data + (sy*(int)src->width + sx) * 4;
if (dalpha) {
dwi = (image->width - width) * 4;
d = image->data + (dy*(int)image->width + dx) * 4;
} else {
dwi = (image->width - width) * 3;
d = image->data + (dy*(int)image->width + dx) * 3;
}
for (y=0; y < height; y++) {
for (x=0; x < width; x++) {
alpha = *(s+3);
calpha = 255 - alpha;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; s++; d++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; s++; d++;
*d = (((int)*d * calpha) + ((int)*s * alpha))/256; s++; d++;
s++;
if (dalpha)
d++;
}
d += dwi;
s += swi;
}
}
}
void
RCombineAreaWithOpaqueness(RImage *image, RImage *src, int sx, int sy,
unsigned width, unsigned height, int dx, int dy,
int opaqueness)
{
int x, y, dwi, swi;
int c_opaqueness;
unsigned char *s, *d;
int dalpha = HAS_ALPHA(image);
int dch = (dalpha ? 4 : 3);
if(!calculateCombineArea(image, src, &sx, &sy, &width, &height, &dx, &dy))
return;
d = image->data + (dy*image->width + dx) * dch;
dwi = (image->width - width)*dch;
c_opaqueness = 255 - opaqueness;
#define OP opaqueness
#define COP c_opaqueness
if (!HAS_ALPHA(src)) {
s = src->data + sy*src->width*3;
swi = (src->width - width) * 3;
for (y=0; y < height; y++) {
for (x=0; x < width; x++) {
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; s++; d++;
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; s++; d++;
*d = (((int)*d *(int)COP) + ((int)*s *(int)OP))/256; s++; d++;
if (dalpha)
d++;
}
d += dwi; s += swi;
}
} else {
int tmp;
s = src->data + sy*src->width*4;
swi = (src->width - width) * 4;
for (y=0; y < height; y++) {
for (x=0; x < width; x++) {
tmp = (*(s+3) * opaqueness)/256;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
*d = (((int)*d * (255-tmp)) + ((int)*s * tmp))/256; d++; s++;
s++;
if (dalpha)
d++;
}
d += dwi; s += swi;
}
}
#undef OP
#undef COP
}
void
RCombineImageWithColor(RImage *image, RColor *color)
{
register int i;
unsigned char *d;
int alpha, nalpha, r, g, b;
d = image->data;
if (!HAS_ALPHA(image)) {
/* Image has no alpha channel, so we consider it to be all 255.
* Thus there are no transparent parts to be filled. */
return;
}
r = color->red;
g = color->green;
b = color->blue;
for (i=0; i < image->width*image->height; i++) {
alpha = *(d+3);
nalpha = 255 - alpha;
*d = (((int)*d * alpha) + (r * nalpha))/256; d++;
*d = (((int)*d * alpha) + (g * nalpha))/256; d++;
*d = (((int)*d * alpha) + (b * nalpha))/256; d++;
d++;
}
}
RImage*
RMakeTiledImage(RImage *tile, unsigned width, unsigned height)
{
int x, y;
unsigned w;
unsigned long tile_size = tile->width * tile->height;
unsigned long tx = 0;
RImage *image;
unsigned char *s, *d;
if (width == tile->width && height == tile->height)
image = RCloneImage(tile);
else if (width <= tile->width && height <= tile->height)
image = RGetSubImage(tile, 0, 0, width, height);
else {
int has_alpha = HAS_ALPHA(tile);
image = RCreateImage(width, height, has_alpha);
d = image->data;
s = tile->data;
for (y = 0; y < height; y++) {
for (x = 0; x < width; x += tile->width) {
w = (width - x < tile->width) ? width - x : tile->width;
if (has_alpha) {
w *= 4;
memcpy(d, s+tx*4, w);
} else {
w *= 3;
memcpy(d, s+tx*3, w);
}
d += w;
}
tx = (tx + tile->width) % tile_size;
}
}
return image;
}
RImage*
RMakeCenteredImage(RImage *image, unsigned width, unsigned height, RColor *color)
{
int x, y, w, h, sx, sy;
RImage *tmp;
tmp = RCreateImage(width, height, False);
if (!tmp) {
return NULL;
}
RClearImage(tmp, color);
if (image->height < height) {
h = image->height;
y = (height - h)/2;
sy = 0;
} else {
sy = (image->height - height)/2;
y = 0;
h = height;
}
if (image->width < width) {
w = image->width;
x = (width - w)/2;
sx = 0;
} else {
sx = (image->width - width)/2;
x = 0;
w = width;
}
RCombineArea(tmp, image, sx, sy, w, h, x, y);
return tmp;
}
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